Support



Sept. 25, 1956 H. K. GUMPHREY SUPPORT 3 Sheeis-Sheet J.

Filed Dec. 1, 1952 INVENTOR.

.Z/v/Z 51 01/ 1 Sept- 51956 H. K. GUMPHREY SUPPOR Filed Dec. 1, 1952 INVENTOR. 5%,

United States Patent SUPPORT Harold K. Gumphrey, Plymouth, Wis.

Application December 1, 1952, Serial No. 323,436

Claims. (Cl. 248-186) This invention relates to, vises and more particularly to a vise adapted to hold a piece of work on a machine tool such as, for example, a milling machine.

It is an object of the present invention to provide a vise which will be simple to connect onto the table of a machine tool such as a milling machine or planer.

Another object is to provide a vise of the type described which may be used to index cuts.

Another object is to provide a vise of the character. described having a movable jaw which may be moved rapidly into clamping position to clamp the work piece securely.

A further object is to provide a vise of the character described which will be stronger and more rigid than those now in use.

A further object is to provide a vise which will be less hampered by chips than those now in use.

A further object is to provide a vise in which a work piece may be squared readily with the table.

A still further object is to provide a vise of the character described having an improved means to secure the vise to the bed of the machine tool.

A still further object is to provide a vise in which there are no protruding parts.

A still further object is to provide a vise of the character described in which means are provided to compensate for wear in the ways.

Still further objects will become apparent from the following specification which, when taken in conjunction with the accompanying drawings, illustrates a preferred form of the invention.

In the drawings:

Fig. 1 is a longitudinal vertical cross-section of a vise embodying the present invention;

Fig. 2 is a top plan view of the vise shown in Fig. 1, parts thereof being broken away to show certain other parts more clearly;

Fig. 3 is a cross-section taken on the line 33 of Figs. 1 and 2;

Fig. 4 is a horizontal cross-section taken on the line 44 of Fig. 1;

Fig. 5 is a front elevational view of the angular positioning scale of the vise shown in Fig. 1;

Fig. 6 is a detail view of the cam which clamps the vise 0n the machine bed; and

Fig. 7 is an end view of the cam shown in Fig. 6.

Referring to the drawings, the vise is built on a base 11 which has formed integrally thereon at one end a fixed jaw 12. The jaw 12 has a face plate 13 of hardened steel secured on the fixed jaw by cap screws 15.

.Ways 18 are out along the opposite edges of the upper surface of the base to form guides for the movable jaw 28. The movable jaw 20, like the fixed jaw 12, is provided with a hardened steel face plate 22 which is held on the end of the movable jaw by cap screws 2323.

A fixed abutment 25 is secured on the outer end of the base 11 by cap screws 26 which pass through the base 11 and into the abutment 25. The abutment 25 has an "ice aperture extending therethrough parallel to the ways, the opening being threaded to receive a clamping screw 28.

The clamping screw 28 is provided with right hand threads on one end and left hand threads on the opposite end to fit corresponding threads in the abutment 25 and the movable jaw 20. The outer end of the clamping screw 28 is cut with a square head 29 to enable the screw to be turned either with a wrench or a crank.

The right and left hand threads on the opposite ends of the clamping screw 28 are made of different pitches so that as the movable jaw 20 is moved toward the abutment 25 by turning the screw 28 the inner end of the screw moves into the corresponding threads in the movable jaw Zil and the outer end of the screw 28 moves to the right (as seen in Fig. 1) through the threads in the abutment 25. When the movable jaw is fully retracted the inner end of the screw 28 is entirely within the movable jaw 20 with the jaw 20 contacting the abutment 25.

When the screw 28 is turned in the opposite direction the screw advances to the left (as seen in Fig. 1) through the abutment and the movable jaw moves to the left relative to the end of the screw. When the surfaces of the face plates 13 and 22 are in contact there are sufiicient threads in engagement in the jaw 20 to enable the jaws to be clamped firmly together and the square head 29 is substantially at the outer face of the abutment 25.

The lower side of the base is provided with a fr-ustroconical projection 35. The projection fits into a recess 36 of identical shape in a cylindrical mounting block 38.

The block 38 is cylindrical in outer conformation, the cylindrical surface being graduated in degrees throughout its circumference as shown in Figs. 3 and 5. A Vernier 48 (Fig. 5) is carried in the base 11 and gives angle readings to five minutes (5).

The bottom of the mounting block 38 is provided with keys 43 which fit accurately in the T-slots of the machine tool table so that the keys 43 cooperate in holding the mounting block 38 against angular movement.

The bottom of the mounting block 38 also is provided with an aperture 45 having a first shoulder 46 and a second shoulder 47. A cylindrical clamping plug 50 passes through the aperture 45 with a shoulder 51 of the plug seating on the shoulder 46 in the aperture. A circular apertured plate 53 is received on the shoulder 47 in the aperture 45, and secured to the mounting block 38 by flat head screws 54 (Fig. 4).

The clamping plug 50 has a vertical recess 55 therethrough, the recess having a shoulder which receives the head of a screw 57. The screw 57 has a shank 58 which seats on the upper surface of the plate 53. A threaded extension 59 is formed on the lower end of the shank 5S and extend through the central aperture in the plate 53 and into a threaded opening in a T bar 60. The mounting block 38, the plug 50, the screw 575859, the plate 53 and the T bar 60 combine to form what may be called the mounting structure for the vise.

The T bar 60 is received in a T slot of the machine 7 tool table so that when the screw 57 is tightened (with an Allen wrench) the lower end of the shank 58 clamps the plate 53 securely on the table of the machine tool thus clamping the entire mounting structure against both lateral and angular changes in position. At this'time the plug 50 is free to turn with the upper portion of the vise to change the angle of the vise on the machine.

The plug 56 is provided with a transverse aperture 62 having the upper and lower surfaces thereof spaced apart sufiiciently to accommodate a cam, generally designated 64, and best shown in Figs. 1, 6 and 7.

Referring to Figs. 6 and 7, the cam 64 may comprise a cylindrical lifting section 65 formed tangentially at each end thereof to a cylindrical shaft 66-67. The shaft to clamp the plate 53 in place.

areasso 66"67-is mounted in a round horizontal hole drilled in the 'base intersecting the axis of the frustro-conical projection 35 and extending past the clamping plug 50, so that the end 66 of the cam shaft 6667 is carried in the base 11 on one side of the plug 50, and the end 67 of the shaft 66'67 is'carried in the base 11 on the opposite side ofthe clamping plug 50.

It will be noted that the shaft 67 is flattened'at 68, opposite the low point in the cam 64 in order to permit the shaft 67 to be inserted through the aperture 62 in the plug 50.

Wear is compensated for by a slot 70 and screws 71, so that, as the ways 18 wear, the screws 71 may be tightened to compensate.

Operation In operation, the mounting block 58, together with "theplug 50, the plate 53 and the cap screw 57 and T 'bar 60, constituting the mounting structure, are put in position on the table of a machine tool, not shown, and slid into a desired position by loosening the screw 57 and sliding the T bar 60 and the keys 43- 33 into one of the T slots in the table. When the mounting structure is in the desired position the cap screw 57 may be tightened In this position the plug 50 is free to turn about its vertical axis.

The base 11 of the vise may then be engaged over the plug with the frustro-conical projection 35 fitting within the corresponding aperture 36 in the mounting block 38.

When the base 11 is thus in position the cam and shaft may be inserted through the base and through the plug 50. The vise may then be adjusted by means of the angle scale and vernier 40 to the correct angular position and the base 11 clamped by rotating the shafts 66--67 by means of an Allen wrench. Rotating the shaft 66-67 rotates the cam surface 65, raising it and fastens the base 11 securely on the mounting block 38.

The work piece may then be clamped in position between the jaws 12 and 2i) (or between the plates 13 and '22) by turning the screw 28.

joined claims.

That which is claimed as new and is desired to be secured by United States Letters Patent is:

1. In a device for use on the table of a machine tool,

or the like, a circular mounting block having an angular scale marked thereon, a concentric hub carried by said block, a pair of alined keys on said block to retain the block in fixed angular position on the table, a base pivotally carried by said block, a Vernier carried by said base and coacting with the said angular scale to read thereon, and a cam and cam shaft carried in said base and engaging a portion of the hub to secure the base in a desired angular position.

2. A device adapted for use in connection with a machine tool table, comprising a supporting structure having an upwardly extending frustro-conical opening therein, means to aline the supporting structure on the machine tool table, a supporting plug carried by said supporting structure concentric with said opening, a base having an'aperture in the underside thereof engageable "over said plug, a frustro-conical projection on said base concentric with the opening therein, said projection being receivable in said first mentioned opening, and means to secure the base to the supporting structure with the frustro-conical projection-engaged in the frustro-conical opening and the plug engaged in the opening in the base.

3. A device adapted for use in connection with a machine tool table, comprising a supporting structure having an upwardly extending frustro-conical opening therein, a pair of alined keys on the lower side of said supporting structure adapted to 'aline the vise on the table, a supporting plug carried by said supporting structure concentric with said opening,'a base having an aperture in the underside thereof engageable over said plug, a frustro-conical projection on said base concentric with the opening therein,'said projection being receivable in said first mentioned opening and a cam carried by said base and engageable with said plug to secure the base to the supporting structure with the frustro-conical projection engaged in the frustro-conical opening and the plug engaged in the opening in the base.

4. In a device of the character described, a base having a cylindrical aperture in the lower side thereof extending upwardly perpendicular to the said lower side of the base, a frustro-conical projection formed on the lower side of the base, the projection and the aperture being coaxial, a circular mounting block having a frustro-conical recess receiving the said projection and a co-axial cylindrical aperture extending from the bottom of the recess through the bottom of the block, a cylindrical plug received in the apertures, a collar formed on the lower end of said plug receivable in a recess in the bottom of said block, a retaining plate secured to the bottom of said block to retain the plug in said apertures, securing means passing through a vertical aperture in the plug to secure the block to a machine tool table and releasable means mounted in said base and said plug to secure the base to the plug.

5. In a device of the character described, a base having a cylindrical aperture in the lower side thereof extending upwardly perpendicular to the said lower side of the base, a frustro-conical projection formed on the lower side of the base, the projection and the aperture being coaxial, a circular mounting block having a frustro-conical recess receiving the said projection and a co-axial cylindrical aperture extending from the bottom of the recess through the bottom of the block, a cylindrical plug received in the apertures, a collar formed on the lower end of said plug receivable in a recess in the bottom of said block, a retaining plate secured to the bottom of said block to retain the plug in said apertures, securing means passing through a vertical aperture in the plug to secure the block to a machine tool table, releasable means mounted in said base and said plug to secure the base to the plug, and means to secure the block against rotary movement on the machine tool table.

References Cited in the file of this patent UNITED STATES PATENTS 300,388 Montant June 17,- 1884 499,291 Gury June 13, 1893 652,441 McClellan -lune 26, 1900 1,414,970 Nelson May 2, 1922 2,363,230 Condon et al Nov. 21, 1944 2,369,901 Kozaroczy Feb. 20, 1945 2,465,497 Turrettini Mar. 29, 1949 2,573,542 Cherry Oct. 30, 1951 FOREIGN PATENTS 5,432 Great Britain 1907 427,949 Germany Apr. 22, 1926 656,947 Great Britain Sept. 5, 1951 

